package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     * +
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    @Override
    public OrderSubmitVO submit(OrdersSubmitDTO ordersSubmitDTO) {
        //处理业务异常(地址为空，购物车为空)
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);

        orderMapper.insert(orders);
        List<OrderDetail> orderDetailList = new ArrayList<>();
        //向订单明细表插入n条数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
        //清空购物车
        shoppingCartMapper.deleteByUserId(userId);
        //封装vo返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();

        return orderSubmitVO;
    }


    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
        //生成空json跳过微信支付流程
        JSONObject jsonObject = new JSONObject();

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        Map map = new HashMap();
        map.put("type", 1);
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号：" + ordersDB.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));

    }

    /**
     * 订单分页查询
     *
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pageQuery(Integer page, Integer pageSize, Integer status) {
        PageHelper.startPage(page, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        Page<Orders> orders = orderMapper.pageQuery(ordersPageQueryDTO);//查询订单基本信息

        List<OrderVO> list = new ArrayList<>();
        for (Orders ordersDTO : orders) {
            OrderVO orderVO = new OrderVO();//ordervo是扩展order
            BeanUtils.copyProperties(ordersDTO, orderVO);

            List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(ordersDTO.getId());//查询订单对应的详细菜品信息
            orderVO.setOrderDetailList(orderDetailList);//封装到ordervo中
            list.add(orderVO);//加到list中

        }
        return new PageResult(orders.getTotal(), list);

    }

    /**
     * 订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {

        Orders orders = orderMapper.getById(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        orderVO.setOrderDetailList(orderDetailList);

        AddressBook addressBook = addressBookMapper.getById(orders.getAddressBookId());
        orderVO.setAddress(addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());
        return orderVO;


    }

    /**
     * 用户取消订单
     *
     * @param id
     */
    @Override
    public void userCancelOrder(Long id) throws Exception {
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders order = new Orders();
        order.setId(ordersDB.getId());
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额
            order.setPayStatus(Orders.REFUND);
        }
        order.setStatus(Orders.CANCELLED);
        order.setCancelReason("用户取消");
        order.setCancelTime(LocalDateTime.now());
        orderMapper.cancelById(order);
    }

    /**
     * 再来一单
     *
     * @param id
     */
    @Override
    public void repetition(Long id) {
        Long userId = BaseContext.getCurrentId();
        List<OrderDetail> list = orderDetailMapper.getByOrderId(id);
        List<ShoppingCart> carts = new ArrayList<>();
        for (OrderDetail orderDetail : list) {
            carts.add(ShoppingCart.builder()
                    .userId(userId)
                    .name(orderDetail.getName())
                    .image(orderDetail.getImage())
                    .dishId(orderDetail.getDishId())
                    .setmealId(orderDetail.getSetmealId())
                    .dishFlavor(orderDetail.getDishFlavor())
                    .number(orderDetail.getNumber())
                    .amount(orderDetail.getAmount())
                    .build());
        }
        shoppingCartMapper.insertBatch(carts);
    }

    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList<>();
        for (Orders order : page) {
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(order, orderVO);
            // 查询订单菜品详情信息（订单中的菜品和数量）
            List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(order.getId());

            // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
            List<String> orderDishList = orderDetailList.stream().map(x -> {
                String orderDish = x.getName() + "*" + x.getNumber() + ";";
                return orderDish;
            }).collect(Collectors.toList());
            orderVO.setOrderDishes(orderDishList.toString());

            AddressBook addressBook = addressBookMapper.getById(order.getAddressBookId());
            orderVO.setAddress(addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

            list.add(orderVO);
        }
        return new PageResult(page.getTotal(), list);


    }

    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;


    }

    /**
     * 接单
     *
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders ordersDB = orderMapper.getById(ordersConfirmDTO.getId());
        if (ordersDB == null || ordersDB.getStatus() != Orders.TO_BE_CONFIRMED) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        orderMapper.update(Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build());
    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());
        if (ordersDB == null || ordersDB.getStatus() != Orders.TO_BE_CONFIRMED) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        orderMapper.update(Orders.builder().status(Orders.CANCELLED).id(ordersRejectionDTO.getId()).rejectionReason(ordersRejectionDTO.getRejectionReason()).build());
    }

    /**
     * 取消订单
     *
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        orderMapper.update(Orders.builder().status(Orders.CANCELLED).id(ordersCancelDTO.getId()).cancelReason(ordersCancelDTO.getCancelReason()).cancelTime(LocalDateTime.now()).build());

    }

    /**
     * 派送订单
     *
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB == null || ordersDB.getStatus() != Orders.CONFIRMED) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        orderMapper.update(Orders.builder()
                .id(id)
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build());
    }

    @Override
    public void complete(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB == null || ordersDB.getStatus() != Orders.DELIVERY_IN_PROGRESS) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }


        orderMapper.update(Orders.builder()
                .id(id)
                .deliveryTime(LocalDateTime.now())
                .status(Orders.COMPLETED)
                .build());
    }

    /**
     * 客户催单
     *
     * @param id
     */
    @Override
    public void reminder(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB  == null || ordersDB.getStatus() != Orders.TO_BE_CONFIRMED) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map = new HashMap();
        map.put("type", 2);
        map.put("orderId", id);
        map.put("content", "订单号：" + ordersDB.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}
